They carry some Phottix products, and I don't know why they don't carry the others, but I'd guess it's because of some boring and mundane reason. Maybe Phottix uses a distributor that is chronically late or suffers high breakage. Or maybe they did carry the products and they just weren't profitable. Inventory is risk. The larger the inventory (i.e. the higher the number of products), the more risk is incurred. But if you really want to know, I'd suggest you email Henry P. <henryp@bhphoto.com> and invite him to this thread, he has posted on this forum in the past.